Device holder



FIG. 1 is a perspective view of a device holder as seen from the front, top and left side;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a left side view thereof.

The broken lines shown illustrate portions of the device holder and form no part of the claimed design. 

CLAIM The ornamental design for a device holder, substantially as shown and described. 